The little white flies that are being referred to in the question are most likely whiteflies. Whiteflies are small, soft-bodied winged insects that feed on plant sap, causing leaf damage and a host of other problems. They are moth-like in appearance, about 1/16th of an inch in length with an elongated, somewhat triangular shape, and are most often gray-white in coloring. Whiteflies can be found on various plants, from ornamental flowers to warm-weather vegetables, including tomatoes, eggplant, peppers, and okra. To get rid of whiteflies, some tips include using insecticidal soap, vacuuming bugs away, using sticky traps, and keeping new houseplants away from other plants for 2 to 3 weeks.